There is only a few refineries that refine fuel so most of the gasoline made is the same. The detergents that are in fuels are mandated by the EPA, meaning that even the cheap fuel has detergents/ cleaning agents.

I don't buy fuel from the bigs, shell, exxon, etc. I buy from volero, walmart etc.

It is more cost efficient to buy gasoline over E85 due to the fact that E85 takes 40% more fuel to go the same distance as gas but its not 40% cheaper. I have people complain that when they bought the flex fuel vehicle they thought fuel would be cheaper (and E85 is) but the bill per month was more because of the bad fuel economy of E85 which of course is 85% Ethanol and only 15% gasoline.

Higher octane gasoline has more carbon in it so it tends to get a tick better fuel economy but isn't worth the price paid for the fuel.

Octane wise 87-89 is just fine. As long as its not heavily modified. Im assuming its not.

Brand?..... I chose Valero and stations like it. I like BP fuels British Petroleum is one of the best refineries, even with the deep water horizon, but they are still good.

All fuel sold in the US is under regulation by the ASTM (American society for testing and materials) and the EPA. They have to have certain detergents and everything that goes in to the fuel is strictly regulated. that's what makes fuels so much the same.

Higher octane gasoline has more carbon in it so it tends to get a tick better fuel economy

Robert, would higher octane also mean more carbon deposits inside the engine or exhaust system?

—Dave

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"The Greater the Teacher, the More Powerful the Player."

The Mission Statement:"I want to show any young man that he is far tougher than he thinks, that he can accomplish more than what he dreamed and that his work ethic will take him wherever he wants to go." #BattleReady newhope

I had my throttle bodies or whatever they are changed out a couple years ago. Warranty covered it but it took a huge debate with the dealer.

Car would get to 60 or so and barely accelerate from there. They kept telling me that in the highest gear it's not going to accelerate much. I was like, I know how my car usually accelerates, and this ain't it.

So they switched them and it's been fine ever since. We'll see how long it lasts.

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“If you can't explain it to a six-year-old, you don't understand it yourself.” ― Albert Einstein

I had my throttle bodies or whatever they are changed out a couple years ago. Warranty covered it but it took a huge debate with the dealer.

Car would get to 60 or so and barely accelerate from there. They kept telling me that in the highest gear it's not going to accelerate much. I was like, I know how my car usually accelerates, and this ain't it.

So they switched them and it's been fine ever since. We'll see how long it lasts.

Yeah. They didn't believe it and couldn't replicate it, since you need to be driving over the speed limit on the highway, basically.

I found similar issues mentioned on a Z forum, and that was the solution in that case, so I mentioned it to the dealer. And they found some technical guidance announcement or somesuch from Nissan that said changing the throttle bodies was the way to go, so they did it.

I think they may have changed the injectors first, and that did no good.

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“If you can't explain it to a six-year-old, you don't understand it yourself.” ― Albert Einstein

We took this for a test drive this weekend. 2 liter, 296 HP and turbocharged. They said it requires premium fuel but I ran my BMW 318 on regular with no issues.

--Dave

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"The Greater the Teacher, the More Powerful the Player."

The Mission Statement:"I want to show any young man that he is far tougher than he thinks, that he can accomplish more than what he dreamed and that his work ethic will take him wherever he wants to go." #BattleReady newhope

We took this for a test drive this weekend. 2 liter, 296 HP and turbocharged.

Very nice. Jaguar has been reinventing its image and doing well.

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They said it requires premium fuel

With the supercharger they definitely will recommend high octane. If you keep your foot out of it you'll be fine on midgrade maybe regular, but if your thinking you may get on it I would put high octane in it. Pre-ignition and Detonation are engine killers. It'll first sound like a midget inside your engine with a ball peen hammer under load, then after a while the noise will just stop and you may have a window in the side if the block.

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I ran my BMW 318 on regular with no issues.

Probably not boosted. More air is like cooking on a charcoal grill with the lid open and a lot of oxygen hitting the coals. the heat will be high and you'll burn the meat. With boost you increase the rate of combustion about 1 millisecond per 10 PSI above atmospheric pressure. More air more power more heat more chance for explosions. Octane slows the rate of combustion down back to its normal 3ms (ish)

The Mission Statement:"I want to show any young man that he is far tougher than he thinks, that he can accomplish more than what he dreamed and that his work ethic will take him wherever he wants to go." #BattleReady newhope

The Mission Statement:"I want to show any young man that he is far tougher than he thinks, that he can accomplish more than what he dreamed and that his work ethic will take him wherever he wants to go." #BattleReady newhope